<template>
    <Dialog v-model="dialogVisible" title="上传文件">
        <el-upload
            ref="uploadRef"
            v-model:file-list="fileList"
            :action="url"
            :auto-upload="false"
            :data="data"
            :disabled="formLoading"
            :headers="uploadHeaders"
            :limit="1"
            :on-change="handleFileChange"
            :on-error="submitFormError"
            :on-exceed="handleExceed"
            :on-success="submitFormSuccess"
            accept=".jpg, .png, .gif"
            drag
        >
            <i class="el-icon-upload"></i>
            <div class="el-upload__text"> 将文件拖到此处，或 <em>点击上传</em></div>
            <template #tip>
                <div class="el-upload__tip" style="color: red">
                    提示：仅允许导入 jpg、png、gif 格式文件！
                </div>
            </template>
        </el-upload>
        <template #footer>
            <el-button :disabled="formLoading" type="primary" @click="submitFileForm">确 定</el-button>
            <el-button @click="dialogVisible = false">取 消</el-button>
        </template>
    </Dialog>
</template>
<script lang="ts" setup>
import { getAccessToken, getTenantId } from "@/utils/auth";

defineOptions({ name: "InfraFileForm" });

const { t } = useI18n(); // 国际化
const message = useMessage(); // 消息弹窗

const dialogVisible = ref(false); // 弹窗的是否展示
const formLoading = ref(false); // 表单的加载中
const url = import.meta.env.VITE_UPLOAD_URL;
const uploadHeaders = ref(); // 上传 Header 头
const fileList = ref([]); // 文件列表
const data = ref({ path: "" });
const uploadRef = ref();

/** 打开弹窗 */
const open = async () => {
    dialogVisible.value = true;
    resetForm();
};
defineExpose({ open }); // 提供 open 方法，用于打开弹窗

/** 处理上传的文件发生变化 */
const handleFileChange = (file) => {
    data.value.path = file.name;
};

/** 提交表单 */
const submitFileForm = () => {
    if (fileList.value.length == 0) {
        message.error("请上传文件");
        return;
    }
    // 提交请求
    uploadHeaders.value = {
        Authorization: "Bearer " + getAccessToken(),
        "tenant-id": getTenantId()
    };
    unref(uploadRef)?.submit();
};

/** 文件上传成功处理 */
const emit = defineEmits(["success"]); // 定义 success 事件，用于操作成功后的回调
const submitFormSuccess = () => {
    // 清理
    dialogVisible.value = false;
    formLoading.value = false;
    unref(uploadRef)?.clearFiles();
    // 提示成功，并刷新
    message.success(t("common.createSuccess"));
    emit("success");
};

/** 上传错误提示 */
const submitFormError = (): void => {
    message.error("上传失败，请您重新上传！");
    formLoading.value = false;
};

/** 重置表单 */
const resetForm = () => {
    // 重置上传状态和文件
    formLoading.value = false;
    uploadRef.value?.clearFiles();
};

/** 文件数超出提示 */
const handleExceed = (): void => {
    message.error("最多只能上传一个文件！");
};
</script>
